Brooches by John & Dawn Field This squiggle pattern brooch is made from sterling silver and it features a beautiful 10mm Peridot quartz gemstone. It is flat in shape and measures 45mm in diameter, a '925' sterling silver mark and our maker's mark 'J D F' are stamped into the silver on the back of the brooch.Peridot quartz is a name given to lab. grown Peridot, stones created in a lab are chemically, physically and optically identical to those mined underground — but they have fewer flaws and a lighter carbon footprint.This brooch comes with a choice of gemstones, which are Peridot quartz lab. grown, garnet, amber, turquoise, amethyst, blue chalcedony, Aqua Chalcedony, white moonstone and lab. grown blue opal triplet. Please select the stone of your choice from the 'Finish' drop-down menu above. Features Primary Material : Sterling silver Other Materials : lab. grown and Peridot Quartz Pin Type : pin Dimensions (mm) : 45 One of a Kind : No Metal : sterling silver Gems : peridot Hallmarked : No Cleaning InstructionsThis brooch has been finished with a clear, protective, anti-tarnish coating.